The dev's main game is called Roundscape (link in OP). It's by far the largest RPGM game on this forum that i know of, with tons of content. That game has been finished years ago, but since it still had lots of potential and it was very popular, the dev team kept updating it with new content and bug fixes. Right now they are doing a final-final update nicknamed the "golden patch" where they can finally finish it's development. And since that game is the flagship, it took priority.
The lead dev personally wrote in this thread that they want to continue this game once they finish Roundscape and they can divert that effort into their other projects. If i understood it correctly, apparently it's a personal challenge now to them after reading the negative predictions in this thread.